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OPERATION

BUCKING WITH A WEDGE (Fig. 34)

If the wood diameter is large enough for you to insert a soft

bucking wedge (

B

) without touching the chain, you should

use the wedge to hold the cut open to prevent pinching.

NOTE:

When bucking or felling with a wedge, you may

need to remove the SAFE-T-TIP® anti-kick-back device to

allow the bar to be drawn through the cut. After you have

finished, reinstall the tip.

BUCKING LOGS UNDER STRESS (Fig. 35)

(

D

) LOG SUPPORTED AT ONE END

(

C

) LOG SUPPORTED AT BOTH ENDS

Make the first bucking cut (

E

) 1/3 of the way through the

log and finish with a 2/3 cut (

F

) on the opposite side. 

As you cut the log, it will tend to bend. The saw can

become pinched or hung in the log if you make the first

cut deeper than 1/3 of the diameter of the log.
Give special attention to logs under stress (

G

) to prevent

the bar and chain from pinching.

OVERBUCKING (Fig. 19)

Begin on the top side of the log with the bottom of the saw

against the log; exert light pressure downward. Note that

the saw will tend to pull away from you (

A

).

UNDERBUCKING (Fig. 19)

Begin on the under side of the log with the top of the saw

against  the  log;  exert  light  pressure  upward. 

During underbucking, the saw will tend to push back 

at you (

B

). Be prepared for this reaction and hold the saw

firmly to maintain control.

LIMBING AND PRUNING (Fig. 36)

Work slowly, keeping both hands on the saw with a

firm grip. Maintain secure footing and balance.

Keep the tree between you and the chain while

limbing. Cut from the side of the tree opposite the

branch you are cutting.

Do not cut from a ladder: this is extremely dangerous.

Leave this operation for professionals.

Do not cut above chest height as a saw held higher is

difficult to control against kick-back.

WARNING

Never climb into a tree to limb or prune. Do not

stand on ladders, platforms, a log, or in any

position which may cause you to lose your

balance or control of the saw.

When pruning trees it is important not to make the flush

cut next to the main limb or trunk until you have cut off

the  limb  further  out  to  reduce  the  weight. 

This prevents stripping the bark from the main member.

1. Underbuck the branch 1/3 through for your first 

cut (

A

).

2. Overbuck the branch to drop it (

B

).

3. Finish by cutting smoothly and neatly against the

main member (

C

) so the bark will grow back to seal

the wound.

WARNING

If the limbs to be pruned are above chest height,

hire a professional to perform the pruning.

CUTTING SPRING POLES (Fig. 37)

A spring pole (

A

) is any log, branch, rooted stump, 

or sapling which is bent under tension by other wood so

that it springs back if the wood holding it is cut or

removed. On a fallen tree, a rooted stump has a high

potential of springing back to the upright position during

the bucking cut to separate the log from the stump. 

Watch out for spring-poles; they are dangerous.

WARNING

Spring poles are dangerous and could strike the

operator causing the operator to lose control of

the chainsaw. This could result in severe or fatal

injury to the operator.

MAINTENANCE

ASSEMBLING THE BAR AND CHAIN (Fig. 3 &

38 - 47)

DANGER

Never start the engine before installing the 

guide bar, chain, drivecase cover, and clutch

drum. Without all these parts in place, the clutch

can fly off or explode exposing the user to

possible serious injury.

WARNING

To avoid serious personal injury, read and

understand  all  the  safety  instructions  in 

this section.

1.  Always place the switch in the stop “

O

” position

before you work on the saw.

2.  Make sure the chain brake is not set by pulling the

chain brake lever/hand guard towards the front

handle to the RUN position (

A

). 

3.  Wear gloves when handling the chain and bar. 

These components are sharp and may contain burrs.

10

English

PCN 4040_4545 manual 

Summary of Contents for PCN 4040

Page 1: ...N197 PCN 4040 CHAINSAW OWNER S OPERATION MANUAL...

Page 2: ......

Page 3: ...STOP...

Page 4: ......

Page 5: ......

Page 6: ......

Page 7: ...cio Attenzione Prima di procedere al montaggio e alla messa in funzione indispensabile leggere attentamente le istruzioni del presente manuale Aten o indispens vel ler as instru es deste manual antes...

Page 8: ...u read and understand this operator s manual and all labels affixed to the tool Safety is a combination of using common sense staying alert and knowing how your saw works KNOW YOUR TOOL Read the opera...

Page 9: ...n the tension in the wood fibres is released KEEP THE HANDLES dry clean and free of oil or fuel mixture OPERATE THE CHAINSAW ONLY in well ventilated areas DO NOT OPERATE A CHAINSAW IN A TREE unless yo...

Page 10: ...en cutting on the bottom edge of the bar and the PUSH when cutting along the top edge NOTE Your chainsaw has been fully factory tested It is normal to find some slight oil residue on the saw MAINTENAN...

Page 11: ...eaning of the mechanism the dependability of a chain brake to perform under field conditions cannot be certified Keep the SAFE T TIP nose guard on the saw guide bar and use proper cutting techniques L...

Page 12: ...parks and flames Do not inhale fuel vapour Do not let petrol or oil come in contact with your skin Keep petrol and oil away from the eyes If petrol or oil comes in contact with the eyes wash them imme...

Page 13: ...6...

Page 14: ...use loss of control PUSH AND PULL Fig 19 The reaction force is always opposite to the direction the chain is moving Thus the operator must be ready to control the PULL A when cutting on the bottom edg...

Page 15: ...e idling speed screw T anticlockwise to reduce the idle RPM and stop the chain movement If the saw chain still moves at idling speed contact a Ryobi service dealer for adjustment and discontinue use u...

Page 16: ...ch NOTE Never cut through to the notch Always leave a band of wood between the notch and back cut approximately 2 inches 5 cm or 1 10 the diameter of the tree This is called a hinge or hingewood E It...

Page 17: ...mb into a tree to limb or prune Do not stand on ladders platforms a log or in any position which may cause you to lose your balance or control of the saw When pruning trees it is important not to make...

Page 18: ...49 50 WARNING Never touch or adjust the chain while the motor is running The saw chain is very sharp Always wear protective gloves when performing maintenance on the chain 1 Stop the engine before set...

Page 19: ...edge dulls quickly SIDE PLATE ANGLE Fig 58 D CORRECT 80 Produced automatically if you use the correct diameter file in the file holder E HOOK Grabs and dulls quickly increases the potential of KICK BA...

Page 20: ...s of the carburettor 1 For access to the air filter and carburettor area loosen the three screws A holding the cylinder cover B 2 Activate chain brake 3 Lift the front of the cylinder cover past chain...

Page 21: ...your saw in good condition WARNING Silencer surfaces are very hot during and after operation of the chainsaw Keep all body parts away from the silencer Serious burns may occur if contact is made with...

Page 22: ...rocedure with a new sparking plug Engine starts but will not Carburettor requires L Contact a Ryobi service dealer for accelerate properly Low jet adjustment carburettor adjustment Engine starts but w...

Page 23: ...n Operating Chain Brake earlier in this manual 2 Chain tension too tight 2 Tension chain per instructions in Maintenance Adjusting the Chain Tension earlier in this manual 3 Check guide bar and 3 Refe...

Page 24: ...the retailer and given to the end user Deterioration caused by normal wear and tear unauthorised or improper use or maintenance or overload are excluded from this guarantee as are accessories such as...

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